Tag
speculation
- May 13, 2026 The Reorder Buffer and In-Order Retirement How entries move through the reorder buffer from allocation to commit, why retirement order is what makes speculative and out-of-order execution safe, and what limits the buffer size. computer architecture
- May 4, 2026 Load-Store Ordering and Memory Disambiguation in a Speculative Machine Why loads may run ahead of stores, how the memory order buffer checks addresses it does not know yet, and what happens when a load guesses wrong. computer architecture
- Apr 24, 2026 Tiered Compilation and Deoptimization: Undoing a Speculation How a runtime decides when to compile, what a speculation record contains, and how execution resumes in the interpreter when a guard fails. programming languages
- Feb 5, 2026 Loop-Invariant Code Motion and the Conditions It Needs Hoisting an expression out of a loop requires proving it computes the same value on every iteration, and each of the conditions that license it fails in a way that costs correctness rather than speed. compilers
- Jun 9, 2025 Checkpointing and Recovery from Misprediction How a speculative machine restores an exact rename mapping after a wrong branch, why per-branch checkpoints beat a walk-back repair, and what recovery latency costs. computer architecture
- Feb 5, 2025 Monomorphic Inline Caches and the Guard That Makes Them Work How a single cached layout and offset turn a dynamic property access into a compare and a load, what the guard must verify beyond layout identity, and why one shape is the case worth optimizing hardest. language runtimes
- Nov 3, 2024 Value Prediction and the Limits of Speculating on Data What it would take to break true data dependencies, why value prediction attacks a different limit than branch prediction, and the correctness and cost barriers that keep it out of shipping cores. computer architecture
- Aug 13, 2024 Type Feedback and the Speculation Budget How a runtime decides what to speculate about from what the interpreter observed, why the counters that trigger optimization are the same counters that guard it, and what happens when a speculative bet loses. language runtimes